Finding the Fourth Proportional to 1,105.56, 1,656.69 and 693.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.56 : 1,656.69 = 693.45 : x
2. Step 2: Convert to fraction form
   1,105.56/1,656.69 = 693.45/x
3. Step 3: Cross multiply
   1,105.56x = 1,656.69 × 693.45
4. Step 4: Simplify right side
   1,105.56x = 1,148,831.68
5. Step 5: Solve for x
   x = 1,148,831.68/1,105.56
6. Step 6: Final answer
   x = 1,039.14